Let u = < -7, -2> . find 4u
a. < -28, -8>
b.< -28, 8>
c. < 28, -8>
d. < 28, 8>

a.  <-28, -8>

Step-by-step explanation:

Given

u = <-7, -2>

To find

4u

In order to find the value of 4u, each element of the ordered pair of the vector will be multiplied with 4

So,

4<-7, -2> = <4 * -7, 4* -2>

4u = <-28, -8>

Therefore,

4u =  <-28, -8>

Option a.  <-28, -8> is the correct answer ..